Legacy high-resolution glow discharge mass spectrometer (GD-MS) optimized for ultra-trace impurity analysis in solid materials. Designed with cryogenic cooling, high-resolution adjustable slits, and robust ion optics for precise quantification across a wide dynamic range.
Specifications
- Category: Inorganic and Isotopic Mass Spectrometry
- Technique: GD-MS
- Manufacturer: Nu Instruments
- Country: United Kingdom of Great Britain and Northern Ireland
- Available: Inactive
Specifications
Legacy high-resolution glow discharge mass spectrometer (GD-MS) optimized for ultra-trace impurity analysis in solid materials. Designed with cryogenic cooling, high-resolution adjustable slits, and robust ion optics for precise quantification across a wide dynamic range.
- Status: Inactive
- Country: United Kingdom of Great Britain and Northern Ireland
- Isotopic: Yes
- Elemental: Yes
- Analyte Type / Target Of Analysis: Metals and non-metals
- Measurable Isotopes/Elements: Most elements between m/z 3 to 300, including trace and matrix-level components
- Analyzer Type: Magnetic Sector MS
- Ion Source Type: Glow discharge
- Signal Stability / Relative Standard Deviation: <3% over 10 minutes; <5%over 30 minutes (for copper signals at RP>4000)
- Inlet Types: Pin and flat sample holders for conductive and non-conductive materials, including powders and thin films
- High Resolution: Yes
- Mass Resolution/ Mass Resolving Power: Adjustable resolution from 300 to over 10,000 (10% valley definition)
- Sensitivity: 5×10−10 amps for copper signals at RP>4000
- Dynamic Range: 12 orders of magnitude
- Detection Limits: Sub-ppb for trace impurities in high-purity materials
- Precision: Internal reproducibility: Major components <3%, Minor <5, Trace <10% RSD
- Detector Type: Faraday detector with charge-coupled design and a secondary electron multiplier (SEM) for extended dynamic range
- Discharge Parameters: Voltage: 1–1.2 kV; Current: 1–3.5 mA; Gas flow: 0.5–0.6 sccm
- Geometry Type: Double-focusing with electrostatic and magnetic sectors
- Focusing Type: Continuously adjustable zoom optics
- Magnetic Sector Radius/ Angle: 25 cm radius, 90° deflection
- Electric Sector Radius/ Angle: 32 cm radius/ 120 deg
- Cooling System: Liquid nitrogen cryo-cooling and water chiller for turbomolecular pumps
- Vacuum System: Three-zone vacuum system with turbo molecular and ion-getter pumps; operating pressure <2×10−7 mbar
- Gas Supply: Argon (99.9995%) and compressed air
- Power Specifications: 230 V, 50/60 Hz, 16 A; 1.5–2 kW consumption during operation
- Environmental Specifications: Temperature: 20–24°C; Humidity: <70%
- Physical Specifications: 1670 mm (W) × 1600 mm (D)
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